Kimi ni Todoke: From Me to You: Soulmate, Vol. 1

Despite considering herself unlovable, and despite feeling deeply satisfied with Sawako's companionship, Kurumi decides to put herself out there and try dating. When she's pestered by a persistent suitor after a party, a handsome stranger comes to her rescue. He looks suspiciously like Sawako...or not so suspicious, considering that he is actually Sawako's cousin! When Kurumi starts to feel drawn to him, could it be love?